Same treatment as the branch's `as_chunks` commit (Rust 1.99's
`chunks_exact_to_as_chunks` lint) for the flattener's coverage pass, the
CMYK ink compositor, the Flattener Preview highlight and four test helpers.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The M3/M4 work added ten panic sites the new workspace lints deny:
- doc: the lens/taper width profiles fall back to a uniform profile
instead of `expect` (the presets are a constant table, covered by tests).
- engine: `FlattenOptions::default` builds the medium preset directly
(`builtin`), `apply` skips an empty group instead of `expect`, the
writable-format fallback reports an error instead of `expect`, and the
new-art template's stroke comes back as an `Option` (it always has one)
instead of `expect`.
- tools: the freeform gradient drag returns no actions for a grab it never
starts (was `unreachable!`), and the gradient tool's release takes the
gesture with `if let` instead of `expect`.
Behaviour on the success paths is unchanged.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Shipped code no longer unwraps, expects or panics: every one of the 124
unwrap()/expect()/panic!/unreachable! sites outside tests now handles the
failure (Result/Option, ?, let-else, defaults) and reports errors to the user.
- Lints: workspace clippy denies unwrap_used, expect_used, panic, todo,
unimplemented and unreachable; clippy.toml allows them in tests, and
integration tests, examples and testkit opt out explicitly.
- Safety net (vectorcraft_engine::guard): a panic in a top-level command rolls
the document back and returns EngineError::Internal; a panicking tool is
reset; the MCP server answers with an internal error and keeps serving; the
UI frame and each control request are guarded.
- APIs that hid failures now return them: Rendered::to_png/to_jpeg/to_webp
return Result (JPEG/WebP errors used to write empty files),
FontDb::face returns Option, Region::top returns Option.
- Fuzzing: engine/tests/import_fuzz.rs feeds garbage, hostile and mutated SVG
and PDF through import → render → export (30k cases locally, no panics).
- Docs: AGENTS.md/CLAUDE.md rule, docs/development.md "Robustness" section,
README pointer and a PR template checklist.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
A CMYK document that shows transparency is drawn once per ink plane
(complemented C, M, Y; complemented K as a grey) so every blend mode,
opacity, group, knockout and effect composites inks, PDF-style; the
planes' inks are shown through the working CMYK profile (cached 4-D XYZ
table). Cyan multiplied over magenta now shows C100 M100. Opacity masks
keep screen luminance; RGB colours and placed images are separated
first. RGB documents and opaque CMYK documents keep the screen-colour
path.
PDF export of CMYK documents writes its transparency groups with
/CS /DeviceCMYK (luminosity mask groups stay RGB) and puts top-level
transparency in a non-isolated page-wide group so it blends in CMYK too.
Flatten Transparency composites CMYK documents ink by ink and makes CMYK
regions. Non-separable modes no longer give NaN for greys.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
flattener.preview {highlight, overprints?, preset?|options?, ids?} reports, without changing the
document, the transparent and affected objects, patterns, outlined strokes and type, rasterized
complex regions, all rasterized areas and flat-colour regions (FlattenReport, worked out by the
flattener's own plan without rendering images). The panel previews a snapshot taken on Refresh,
greyed with the chosen highlight in red, zoomable (click, Alt-click, drag, double-click); its
Overprints, preset and options (Show Options) set how it flattens, and its menu saves them as a
preset. ui.flattenerPreview drives it; the settings persist with the UI state.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Saved presets live in Prefs.flattener_presets (persisted with the preferences) beside the
built-in High, Medium and Low Resolution ones, which stay read-only. New commands:
flattener.presets.list / save / delete / import / export (a .vcflattener JSON file; opening one
imports it). Any saved preset name works as `preset` wherever flattener options are taken
(Session::flatten_options). The manager dialog lists the presets and edits the selected saved
one in place; the Flatten Transparency dialog lists saved presets and gains Save Preset….
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
object.flattenTransparency {preset?|options, ids?} splits the targets into groups of overlapping
objects. Groups with transparency become atomic regions (faces of the arrangement of every fill,
outlined stroke and clipping path) filled with the colour the renderer composites there: blend
modes, group opacity, isolated and non-isolated groups, knockout groups and knockout shapes, over
white or (Preserve Alpha) over nothing. Regions reached by gradients, patterns, images, opacity
masks or raster effects are rendered into one image per group, under the regions, clipped to
them with Clip Complex Regions. The raster/vector balance rasterizes whole groups past its region
budget (all at 0). Options and presets live in FlattenOptions; single visible paints keep their
colour and overprint; text and strokes can be outlined everywhere. One undo step.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
